52091931 has 4 divisors (see below), whose sum is σ = 69455912. Its totient is φ = 34727952.

The previous prime is 52091929. The next prime is 52091947. The reversal of 52091931 is 13919025.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 52091931 - 2¹ = 52091929 is a prime.

It is a super-2 number, since 2×52091931² = 5427138550617522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (52291931) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8681986 + ... + 8681991.

It is an arithmetic number, because the mean of its divisors is an integer number (17363978).

Almost surely, 2^52091931 is an apocalyptic number.

52091931 is a deficient number, since it is larger than the sum of its proper divisors (17363981).

52091931 is a wasteful number, since it uses less digits than its factorization.

52091931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17363980.

The product of its (nonzero) digits is 2430, while the sum is 30.

The square root of 52091931 is about 7217.4740041097. The cubic root of 52091931 is about 373.4709435487.

It can be divided in two parts, 5209 and 1931, that added together give a triangular number (7140 = T₁₁₉).

The spelling of 52091931 in words is "fifty-two million, ninety-one thousand, nine hundred thirty-one".